BRIDGEWATER – It has been nearly two weeks since four mosquitoes trapped in Bridgewater tested positive for EEE, and experts have reported no new cases since then.

“The good news was there weren’t any positives this week, so hopefully it was a one-time thing that isn’t going to amplify,” said Anthony Texeira, the superintendent of the Plymouth County Mosquito Control Project.

EEE, or eastern equine encephalitis, is a rare, but often fatal virus spread to humans by mosquitoes. The four mosquitoes that were trapped in the Hockomock Swamp in Bridgewater marked the first cases of the virus to appear this summer.

In the wake of the discovery, the state’s Department of Public Health raised the EEE alert level for Bridgewater from “low” to “moderate.” Neighboring towns, Easton, Middleboro, Raynham and West Bridgewater already were on moderate alert based on last year’s EEE activity.

The Plymouth County Mosquito Control Project conducted spraying in Bridgewater and portions of West Bridgewater following the positive tests and will continue to spray in the future, Texeira said.

Particular attention will be paid to the Hockomock Swamp and surrounding areas.

“We’re more concerned about that area, and we want to make sure that we do anything we can to prevent an abundance of mosquitoes amplifying the virus.”

When asked about the mosquito population as a whole this summer, Texeira said the numbers have been “pretty average,” but that they could “change on a dime,” noting that recent rainfall could bring more mosquitoes.

Even when mosquito populations are small, however, residents should still take precautions to protect themselves.

“It doesn’t take a lot of mosquitoes to harm you,” Texeira said. “All it takes is one bite from the wrong mosquito.”